Impkovement



S. F. MACKIE.

Ore Stamp.

. Patented April 30, 1867.

WW.- I an M MMM gonna tetra ggdatrnt fire IMPROVEMENT IN MILLS FOR GBUSHING ORE.

{the Stimuli Itfttl'th it in flnst itetters again amt mating part at tin same.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, SIMON F. MACKIE, of New York, in the county of New York, State of New York, have invented new and useful improvements in the Mode of Constructing Stamp- Mills; and in. order that no misunderstanding may arise as to what I consider a stamp-mill, I state that the ends or objects proposed to be'attaincd in theconstruction of the machine which I thus designate are as follows: I I

First, that the linear dimensions of the lumps of ore fed to the machine shall be reduced in passing through said machine; second, that the lumps, pieces, or particles of ore, which are the product of said machine, shall possess, as nearly as possible, uniform linear dimensions; third, the process shall be continuous. In themost perfect form of this machine the ore is never handled except in bulk. In order to explain this idea more fully I'wouldstate that the raw material-the ore to be crushed-is deposited in suitable receptacles in large quantitles, 1:. 9., is shot out of a cart into these receptacles, and after passing through the machine, the manufactured product-the crushed ore-passes by suitable contrivances either into receptacles, whence it may be carted, or into machines, where-it is submitted to a subsequent process. Further, I desire to state that since the product of a stamp-mill 1nay,according to the subsequent process which thepeculiar nature of the ore demands, require to be reduced to different degrees of fineness, e. g., the product may be required in the shape of fine sand, or it may he required as coarse gravel, it is impossible to predicatethe linear dimensions of those portions of the machine whieh'regulatc the fineness of the product, prior to the prediea'tion of the subsequent processes to which the ore is to-bc subjected. I

The improvements which I desire to patent are, first, improvements which allow the velocity of the driving-- shaft to be incrensed, thereby obtaining an increased product; second, improvements which tend to render the machine more durable. v

And I do hereby declare that the following is a true, full, and exact description of the construction an'd operation of my improved machine, regard being bad to the annexed drawings, said drawings being a part of this specification, in which Figure 1 is an exterior elevation.

Figure 2, a transverse section.

Figure 3, an enlarged longitudinal section of the stamp; and

Figured, a transverse section of the stamp-head.

Having secured, by any known and convenient means, a good and suitable foundation for the machine, I set up the standards 8, these I connect by the cross-pieces t, towhich I bolt the guides 24. At the head of the standards, or in other suitable position, I fasten bearingsv of the ordinary construction. In these hearings rests the cranked shaft 2', which receives, when the machine is'to be run, a continuous rotary motion'from any convenient source of power 1:. g., a steam engine. The cranks on this shaft are fitted with appropriate connectingrods 1-, which couple the cranks with the rods g, hereafter to be described.

I will now proceed to describe the construction of the stamp itself. A longitudinal section of this stamp is showuin fig. 3, from which it will be seen that thc'upper portion of the stamp-head a is fashioned into a cylinder, Z), to which is adapted a cover, 0, with stuffing-box (Z. In this cylinder are bored two or three small holes, marked a in the drawing. To this cylinder 11 I fit a piston-rod, g,-and piston f. Now, when the pistonvrod of a stamp, fitted as above, receives a continuous reciprocating rectilinear motion, a. 9., by means of a crank and connecting-rod, this reciprocating rectilinear motion will be communicated to the stamp-head, but the relative velocities of the piston and stamp-head will be modified by the spring formed by the atmospheric air enclosed between the piston and cylinder ends. I render the piston air-tight by means of the following packing: The piston is of cast iron, iii whose edge are turned two square grooves, and acorresponding steel ring is fitted into each groove, the rings being divided at one part with a plain but joint and sprung into their places. Two small holes are bored from each face of the piston to the bottom of the nearest groove. The faces of the piston must be turned up exactly parallel with the cylinder ends. In order that the stamp-head shall not be subjected to injurious strains during casting and subsequent cooling, I cast the hollow in the stamp-head round at the bottom, as shown in fig. 3, and then, by fitting in the circular piece 2', form a cylinder of any desired length. The projections 71, which run in the guides it, further serrc to strengthen the upper portion of the cylinder.

Nov; returning to the construction of the machine, I would call attention to the fact that the guides u constrain the stem a and throu h the intervention of the cross-head 1 the iston-rod to move in and down P a a: t 1 p .9 l

in the same right line. Underneath the stamps Iplaee a suitable bed, is, which I prefer to place on a foundation distinct from that whielrsupports the standards .9. Around this bed, sometimes on one sometimes on two or more sides, I fasten the screens Z, more distinctly indicated in fig. 2 by the blue, line, these screens can be made of sheet iron punched with holes or slits. The ore is fed into the machine through the hopper m, and water may be introduced through the pipe n. To prevent the dust or sand from wearing the sliding-faces, &-c., I enclose those parts of my machine by a board cover, 0, more distinctly indicated in fig. 2 by the red line. This cover is pierced with holes for the stamps to pass through, to which holes stuiiing-hoxes may, if it is deemed desirable, be adapted. Of course this cover must have suitable doors or traps for obtaining ready access to the machine.

The operation of my machine is as follows: Having first seen that the bed khas a suitable bed of ore thereon, I set the shaft 0 in rotation, introducing simultaneously, by means of troughs, creepers rafi wheels, jacobs ladders, or otherwise, a continuous supply of ore through the hopper m, at the same time introducing a suitable quantity of water. The impact of the stamps a on the ore, thus placed on the bed 7:, reduces it to the state of fineness desired. After having reached this point it passes through the screens, andthen, hy troughs or other- .wise, to such a place as may be convenient for the subsequent operations. Mathematically speaking, the fineness of the product, 2'. 0., of the crushed ore, is a function of the velocity of the stamp, the quantity of water supplied, the height of the screens above the bed, the dimensions of the holes in the screens, and the dimensions of the screens themselves.

I claim as my invention- 1. The combination of the cylinder stauipdieads 0, covers a, pistonsf, piston-rods g, cross-head 1 connectingrods 2?, cranked shaft 9;, and guides u, with the bed Is, and screen I, substantially as herein described and for the purposes herein set forth. 7

2. The plate 3, in combination with the flanged stamp-head. as described.

SlMON F. MACKIE.

Witnesses:

H. W. Convex, WtLLtAn 'i GRAPE. 

